Washing machine



FIG. 1 is a side perspective view thereof;

FIG. 2 is a front view thereof;

FIG. 3 is a first side view thereof;

FIG. 4 is a second side view thereof; and,

FIG. 5 is a top view thereof.

The broken lines depict portions of the washing machine that form no part of the claimed design. 

The ornamental design for a washing machine, as shown and described. 